pyqt5实现复选下拉框

复选下拉框

1.界面

2.界面转ui

python -m PyQt5.uic.pyuic box_ui.ui -o box_ui.py

界面代码

"""
box_ui.py
"""
from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(321, 226)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setObjectName("label")
        self.verticalLayout.addWidget(self.label)
        self.comboBox = QtWidgets.QComboBox(self.centralwidget)
        self.comboBox.setObjectName("comboBox")
        self.verticalLayout.addWidget(self.comboBox)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 321, 23))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label.setText(_translate("MainWindow", "复选下拉框"))

3. 复选下拉框代码

class ComboCheckBox(QComboBox):
    def __init__(self, items: list):
        super(ComboCheckBox, self).__init__()
        self.items = ["全选"] + items  
        self.box_list = []  
        self.text = QLineEdit()  
        self.state = 0  
        q = QListWidget()
        for i in range(len(self.items)):
            self.box_list.append(QCheckBox())
            self.box_list[i].setText(self.items[i])
            item = QListWidgetItem(q)
            q.setItemWidget(item, self.box_list[i])
            if i == 0:
                self.box_list[i].stateChanged.connect(self.all_selected)
            else:
                self.box_list[i].stateChanged.connect(self.show_selected)
        # q.setStyleSheet("font-size: 20px; font-weight: bold; height: 40px; margin-left: 5px")
        # self.setStyleSheet("width: 300px; height: 50px; font-size: 21px; font-weight: bold")
        self.text.setReadOnly(True)
        self.setLineEdit(self.text)
        self.setModel(q.model())
        self.setView(q)

    def all_selected(self):
        if self.state == 0:
            self.state = 1
            for i in range(1, len(self.items)):
                self.box_list[i].setChecked(True)
        else:
            self.state = 0
            for i in range(1, len(self.items)):
                self.box_list[i].setChecked(False)
        self.show_selected()

    def set_selected(self, selected_list):
        for i in range(1, len(self.items)):
            self.box_list[i].setChecked(False)
        for item in selected_list:
            for i in range(1, len(self.items)):
                if self.box_list[i].text() == item:
                    self.box_list[i].setChecked(True)

    def get_selected(self):
        ret = []
        for i in range(1, len(self.items)):
            if self.box_list[i].isChecked():
                ret.append(self.box_list[i].text())
        return ret

    def show_selected(self):
        self.text.clear()
        ret = '; '.join(self.get_selected())
        self.text.setText(ret)

4.使用

class MyWindow(Ui_MainWindow):
    def setupUi(self, MainWindow):
        super().setupUi(MainWindow)
        self.verticalLayout.removeWidget(self.comboBox)
        #self.horizontalLayout.removeWidget(self.comboBox)
        combo = ComboCheckBox(["A", "B","C","D" ])
        combo.parent = self.centralwidget
        self.comboBox = combo
        self.comboBox.setObjectName("comboBox")
        self.verticalLayout.addWidget(self.comboBox)
        # self.horizontalLayout.addWidget(self.comboBox)


class MyMainWindow(QMainWindow, MyWindow):
    def __init__(self, *args, **kwargs):
        super(MyMainWindow, self).__init__(*args, **kwargs)
        self.setupUi(self)
        self.show()
        self.do_signal_slots()

    def do_signal_slots(self):
        pass


if __name__ == "__main__":
    app = QApplication(sys.argv)
    myMainWindow = MyMainWindow()
    sys.exit(app.exec_())